Synovia structure joints

Synovial joints

Most movable, all are diarthroses, each contain a fluid-filled joint cavity

articular cartilage

end of opposing bones are covered with hyaline cartilage

joint cavity

is a potential space that hold amount of synovial fluids

Articular capsule

Joint cavity is enclosed in a two layer capsule, fibrous layer, synovial membrane

fibrous layer

dense irregular tissue which strengthens joints

synovial membrane

Loose connective tissue, Lines joint capsules and covert internal joint surface

function to make synovial fluid

synovial fluids

a viscous fluid to raw egg white

A filtrates blood

Arises from capillary from the synovial membrane

weeping lubrication

pressure on joints, squeezes synovial fluids in and out of articular cartilage

Reinforcing ligaments

Often are thickened parts of the fibrous layer

Sometimes extracapsular ligaments located outside the capsule

sometimes intracapsular ligaments located internal to the capsule

articular discs

occurs in joints whose articulating bones have somewhat different shape

Temporomandibular joint and knee joint

Location of articular discs

Bursae and tendon sheaths

closed bags of lubricants,

reduce friction between body elements

Bursae

flatten fibrous sac lined by synovial membrane

tendon sheath

an elongated bursae that wraps around a tendon